@article {Krieger2007a,
	title = {Design and preliminary accuracy studies of an MRI-guided transrectal prostate intervention system},
	journal = {Medical image computing and computer-assisted intervention (MICCAI)},
	volume = {10},
	number = {Pt 2},
	year = {2007},
	pages = {59{\textendash}67},
	publisher = {Department of Mechanical Engineering, Johns Hopkins University, Baltimore, USA},
	abstract = {<p>This paper reports a novel system for magnetic resonance imaging (MRI) guided transrectal prostate interventions, such as needle biopsy, fiducial marker placement, and therapy delivery The system utilizes a hybrid tracking method, comprised of passive fiducial tracking for initial registration, subsequent incremental motion measurement along the degrees of freedom using fiber-optical encoders, mechanical scales Targeting accuracy of the system is evaluated in prostate phantom experiments Achieved targeting accuracy, procedure times were found to compare favorably with existing systems using passive, active tracking methods Moreover, the portable design of the system using only standard MRI image sequences, minimal custom scanner interfacing allows the system to be easily used on different MRI scanners</p>
},
	keywords = {Algorithms, Artificial Intelligence, Automated, Biopsy, Computer-Assisted, Equipment Design, Equipment Failure Analysis, Humans, Image Enhancement, Image Interpretation, Imaging, instrumentation/methods, Interventional, Magnetic Resonance Imaging, Male, methods, Needle, pathology/surgery, Pattern Recognition, Pilot Projects, Prostatectomy, Prostatic Neoplasms, Rectum, Reproducibility of Results, Robotics, Sensitivity, Specificity, Three-Dimensional, User-Computer Interface},
	author = {Axel Krieger and Csaba Csoma and Iulian Iordachita and Peter Guion and Anurag K. Singh and Gabor Fichtinger and Whitcomb, Louis L.}
}
@article {Fischer2007a,
	title = {Validation system of MR image overlay and other needle insertion techniques},
	journal = {Studies in health technology and informatics},
	volume = {125},
	year = {2007},
	pages = {130{\textendash}135},
	publisher = {Engineering Research Center, Johns Hopkins University, Baltimore, MD, USA},
	abstract = {<p>In order to develop accurate, effective augmented reality (AR) systems used in MR, CT guided needle placement procedures, a comparative validation environment is necessary Clinical equipment is prohibitively expensive, often inadequate for precise measurement Therefore, we have developed a laboratory validation system for measuring operator performance using different assistance techniques Electromagnetically tracked needles are registered with the preoperative plan to measure placement accuracy, the insertion path The validation system provides an independent measure of accuracy that can be applied to varying methods of assistance ranging from augmented reality guidance methods to tracked navigation systems, autonomous robots In preliminary studies, this validation system is used to evaluate the performance of the image overlay, bi-plane laser guide, and traditional freehand techniques</p>
},
	keywords = {Computer Simulation, Magnetic Resonance Imaging, Needles, Reproducibility of Results, Tomography, United States, X-Ray Computed},
	author = {Gregory Fischer and Eva Dyer and Csaba Csoma and Anton Degeut and Gabor Fichtinger}
}
